Evaporative cooler



FIG. 1 is a view in front elevation of an evaporative cooler embodying our new design, the rear being a mirror image of the front shown;

FIG. 2 is a top view thereof;

FIG. 3 is a view in elevation taken from the left side thereof, the right side being a mirror image of the left side shown; and

FIG. 4 is a bottom plan view thereof. 

The ornamental design for an evaporative cooler, substantially as shown. 